(19)
(11) EP 4 343 304 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.06.2024 Bulletin 2024/26

(43) Date of publication A2:
27.03.2024 Bulletin 2024/13

(21) Application number: 24156554.8

(22) Date of filing: 28.03.2019
(51) International Patent Classification (IPC): 
G02B 7/02(2021.01)
G02B 19/00(2006.01)
G01N 15/14(2024.01)
 G02B 27/09(2006.01)
G01N 15/1434(2024.01)
(52) Cooperative Patent Classification (CPC):
G01N 15/1434; G02B 7/021; G02B 19/0052; G02B 19/0014; G02B 7/023; G02B 7/028
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 30.03.2018 US 201862650783 P

(62) Application number of the earlier application in accordance with Art. 76 EPC:
19717083.0 / 3776051

(71) Applicant: IDEXX Laboratories, Inc.
Westbrook, ME 04092 (US)

(72) Inventors:
  • MISENER,, Garland Christian
    Portland, Maine 04103 (US)
  • MOON,, Michael Ryan
    Scarborough, Maine 04074 (US)
  • MCELWAIN,, Spencer Franklin
    Saco, Maine 04072 (US)
  • PAPALE,, Alan
    Saco, Maine 04072 (US)

(74) Representative: Grey, Ian Michael et al
Venner Shipley LLP 200 Aldersgate
London EC1A 4HD
London EC1A 4HD (GB)

   


(54) FLOW CYTOMETER, LASER OPTICS ASSEMBLY THEREOF, AND METHODS OF ASSEMBLING THE SAME


(57) A flow cytometer is disclosed. It comprises a flow cell defining a flow direction; a collimation assembly including laser diode and a collimating lens configured to produce a laser beam along an axis; a positive cylindrical lens disposed on the axis configured to receive the laser beam from the collimation assembly; and a negative cylindrical lens disposed on the axis and configured to receive the laser beam from the positive cylindrical lens. A cylindrical objective lens is disposed on the axis and is configured to receive the laser beam from the negative cylindrical lens and project the laser beam onto the flow cell such that the laser beam incident on the flow cell defines a first beam waist 1/e2 diameter in a direction parallel to the flow direction of the flow cell of 6.7 µm to 9 µm and a second beam 1/e2 diameter in a direction perpendicular to the flow direction of the flow cell of 190 µm to 210 µm.







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